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I am looking for some sort of power management for my old laptop which is running openSUSE Leap. I want to set up maximum usage of processor to 50% or even less. In Windows this is easy with a couple of clicks, but in Linux I couldn't find a proper app to handle this.

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It depends on your goal.

  • If you want to restrict a program's access to the processor, try cpulimit or cgroups. Cgroups is much more powerful. It also allows IO limits and limiting entire groups of processes.

  • You might really just want to prioritize a program, using nice (and possibly ionice).

  • If you want to keep your system cool, you may wish to throttle the processor for all programs or use tools such as powertop.

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